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GB/T 37576-2019Cathodic protection of buried metallic gas storage device (English PDF)

金属埋地储气装置阴极保护技术

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

June 4, 2019

Implementation date

May 1, 2020

Scope

GB/T 37576-2019 is the English-translated version of 金属埋地储气装置阴极保护技术.

GB/T 37576-2019 deals with cathodic protection on the outer surface of buried metallic gas storage devices.

Clause 1 says the standard specifies the determination and the criteria, the system design, the installation, the control of parasitic current, the operation test and maintenance, and the record requirements, and that it applies to the external surface cathodic protection system of new and established metal buried gas storage devices.

Clause 2 cites GB/T 21448, GB/T 33373, GB 50058, GB/T 50393, GB/T 50698, SY/T 0017, ISO 15589.1 and NACE RP0572.

Clause 3 takes its terms from GB/T 33373 and then defines the metal buried gas storage device as a metal container such as a tank, a cylinder or a tank that is buried underground for storing gas, and the cathodic polarization potential as the cathodic protection potential without the IR drop, IR being the product of the current I flowing through the cathodic protection loop and the electrolyte resistance R between the protected body and the reference electrode in that loop.

Clause 4 lists the symbols and abbreviations and starts with Ept, the protection potential threshold value that does not contain the IR drop, which the page says is equivalent to Ep in ISO 15589.1; the draft stops in the middle of that entry, so the design, installation and maintenance clauses are not shown.

The standard was proposed by the China Petroleum and Chemical Industry Federation and is under the jurisdiction of the National Anti-corrosion Standardization Technical Committee (SAC/TC381). It was issued on June 4, 2019 and has applied since May 1, 2020.

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Document preview — GB/T 37576-2019

National Standard of the People's Republic of China

ICS: 25.220.99
Classification: A 29

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviations

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

1 Scope

This standard specifies the determination, criteria, system design, installation, and control of the parasitic current on the outer surface of the metal buried gas storage device. System, operation test and maintenance, record requirements.

This standard is applicable to the external surface cathodic protection system of new and established metal buried gas storage devices.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this document. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 21448 buried steel pipeline cathodic protection technical specification

GB/T 33373 corrosion protection electrochemical protection terminology

GB 50058 Explosion Hazardous Environment Power Equipment Design Specification

GB/T 50393 Steel petroleum storage tank anti-corrosion engineering technical specification

GB/T 50698 buried steel pipeline AC interference protection technical standards

SY/T 0017 buried steel pipeline DC drainage protection technical standards

ISO 15589.1 Cathodic protection for pipeline systems in the petroleum, petrochemical and natural gas industries - Part 1: On-land Pipelines

NACE RP0572 Design, installation, operation and maintenance of impressed current deep bed

3 Terms and definitions

The following terms and definitions as defined in GB/T 33373 apply to this document.

3.1 Metal buried gas storage device

A metal container such as a tank, a cylinder, or a tank that is buried underground for storing gas.

3.2 Cathodic polarization potential

No IR (ie, the product of the current I flowing through the cathodic protection loop and the electrolyte resistance R between the protected body and the reference electrode in the loop) Cathodic protection potential.

4 Symbols and abbreviations

The following symbols and abbreviations apply to this document.

Ept. Does not contain the protection potential threshold of the IR drop (ProtectionPotentialThresholdValue), which is equivalent to ISO 15589.1 Ep in […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Normative references

SY/T 0017 · ISO 15589.1

Similar standards

GB/T 37187-2026|GB/T 30788-2025|GB/T 31405-2025|GB/T 33373-2025|GB/T 33378-2025|GB/T 33637-2025

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